11545791831 has 12 divisors (see below), whose sum is σ = 19059719952. Its totient is φ = 6597595296.

The previous prime is 11545791821. The next prime is 11545791853. The reversal of 11545791831 is 13819754511.

11545791831 is a `hidden beast` number, since 1 + 1 + 545 + 79 + 1 + 8 + 31 = 666.

It is not a de Polignac number, because 11545791831 - 2⁷ = 11545791703 is a prime.

It is a super-2 number, since 2×11545791831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11545791821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91633206 + ... + 91633331.

It is an arithmetic number, because the mean of its divisors is an integer number (1588309996).

Almost surely, 2^11545791831 is an apocalyptic number.

11545791831 is a deficient number, since it is larger than the sum of its proper divisors (7513928121).

11545791831 is a wasteful number, since it uses less digits than its factorization.

11545791831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183266550 (or 183266547 counting only the distinct ones).

The product of its digits is 151200, while the sum is 45.

The spelling of 11545791831 in words is "eleven billion, five hundred forty-five million, seven hundred ninety-one thousand, eight hundred thirty-one".